DURING three centuries there had been peace between Christians and Moslems except in Spain and in the eastern Roman Empire, the two states defending the gateways of Europe. The Mohammedans having conquered Syria in the seventh century were in possession of the Holy Land. But they regarded Jesus as a great prophet (though not quite as great as Mohammed), and they did not interfere with the pilgrims who wished to pray in the church which Saint Helena, the mother of the Emperor Constantine, had built on the spot of the Holy Grave. But early in the eleventh century, a Tartar tribe from the wilds of Asia, called the Seljuks or Turks, became masters of the Mohammedan state in western Asia and then the period of tolerance came to an end. The Turks took all of Asia Minor away from the eastern Roman Emperors and they made an end to the trade between east and west.

Alexis, the Emperor, who rarely saw anything of his Christian neighbours of the west, appealed for help and pointed to the danger which threatened Europe should the Turks take Constantinople.

The Italian cities which had established colonies along the coast of Asia Minor and Palestine, in fear for their possessions, reported terrible stories of Turkish atrocities and Christian suffering. All Europe got excited.

Pope Urban II, a Frenchman from Reims, who had been educated at the same famous cloister of Cluny which had trained Gregory VII, thought that the time had come for action. The general state of Europe was far from satisfactory. The primitive agricultural methods of that day (unchanged since Roman times) caused a constant scarcity of food. There was unemployment and hunger and these are apt to lead to discontent and riots. Western Asia in older days had fed millions. It was an excellent field for the purpose of immigration.

Therefore at the council of Clermont in France in the year 1095 the Pope arose, described the terrible horrors which the infidels had inflicted upon the Holy Land, gave a glowing description of this country which ever since the days of Moses had been overflowing with milk and honey, and exhorted the knights of France and the people of Europe in general to leave wife and child and deliver Palestine from the Turks.

A wave of religious hysteria swept across the continent. All reason stopped. Men would drop their hammer and saw, walk out of their shop and take the nearest road to the east to go and kill Turks. Children would leave their homes to ``go to Palestine'' and bring the terrible Turks to their knees by the mere appeal of their youthful zeal and Christian piety. Fully ninety percent of those enthusiasts never got within sight of the Holy Land. They had no money. They were forced to beg or steal to keep alive. They became a danger to the safety of the highroads and they were killed by the angry country people.

The first Crusade, a wild mob of honest Christians, defaulting bankrupts, penniless noblemen and fugitives from justice, following the lead of half-crazy Peter the Hermit and Walter- without-a-Cent, began their campaign against the Infidels by murdering all the Jews whom they met by the way. They got as far as Hungary and then they were all killed.

This experience taught the Church a lesson. Enthusiasm alone would not set the Holy Land free. Organisation was as necessary as good-will and courage. A year was spent in training and equipping an army of 200,000 men. They were placed under command of Godfrey of Bouillon, Robert, duke of Normandy, Robert, count of Flanders, and a number of other noblemen, all experienced in the art of war.

In the year 1096 this second crusade started upon its long voyage. At Constantinople the knights did homage to the Emperor. (For as I have told you, traditions die hard, and a Roman Emperor, however poor and powerless, was still held in great respect). Then they crossed into Asia, killed all the Moslems who fell into their hands, stormed Jerusalem, massacred the Mohammedan population, and marched to the Holy Sepulchre to give praise and thanks amidst tears of piety and gratitude. But soon the Turks were strengthened by the arrival of fresh troops. Then they retook Jerusalem and in turn killed the faithful followers of the Cross.

During the next two centuries, seven other crusades took place. Gradually the Crusaders learned the technique of the trip. The land voyage was too tedious and too dangerous. They preferred to cross the Alps and go to Genoa or Venice where they took ship for the east. The Genoese and the Venetians made this trans-Mediterranean passenger service a very profitable business. They charged exorbitant rates, and when the Crusaders (most of whom had very little money) could not pay the price, these Italian ``profiteers'' kindly allowed them to ``work their way across.'' In return for a fare from Venice to Acre, the Crusader undertook to do a stated amount of fighting for the owners of his vessel. In this way Venice greatly increased her territory along the coast of the Adriatic and in Greece, where Athens became a Venetian colony, and in the islands of Cyprus and Crete and Rhodes.